Herbs, submersed, 1–2 cm. Stems decumbent to erect, highly branched. Leaves green; stipules lanceolate, 1 mm, margins dentate, apex acute; petiole 1–3 mm; blade oblong, 1.2–5 × 0.3–2 mm, base cuneate, apex acute to obtuse. Pedicels 0.1–23 mm, erect. Flowers: sepals 4, equal, elliptic, 0.9–1.3 × 0.5–0.6 mm; petals 4, pale purple, elliptic, 0.8–1 × 0.5 mm; stamens 8; styles 2. Capsules depressed-ovoid, 4-locular, 1–1.1 mm diam. Seeds 3 per locule, oblong to ellipsoid, straight or curved to 15°, 0.7–1 × 0.2–0.3 mm; pits rectangular, length 1–3 times width, in 12 rows, 27–37 per row.
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